2012
DOI: 10.1007/s00122-012-1817-7
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Quantitative trait loci for water-use efficiency in barley (Hordeum vulgare L.) measured by carbon isotope discrimination under rain-fed conditions on the Canadian Prairies

Abstract: Barley (Hordeum vulgare L.) yield is commonly limited by low rainfall and high temperature during the growing season on the Canadian Prairies. Empirical knowledge suggests that carbon isotope discrimination (Δ(13)C), through its negative relationship with water-use efficiency (WUE), is a good index for selecting stable yielding crops in some rain-fed environments. Identification of quantitative trait loci (QTL) and linked markers for Δ(13)C will enhance its use efficiency in breeding programs. In the present s… Show more

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Cited by 26 publications
(19 citation statements)
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“…Because of the correlation with WUE, carbon isotope composition has been analyzed in tissues from a wide range of plant species to assess WUE (Brüggemann et al 2011;Wingate et al 2010). Further, in a growing number of studies it has been used successfully to investigate the role of WUE in drought adaptation (Ahmed et al 2013;Chen et al 2012). That is, as the ratio of internal to external CO 2 decreases, both WUE and carbon isotopic composition increase.…”
Section: Introductionmentioning
confidence: 99%
“…Because of the correlation with WUE, carbon isotope composition has been analyzed in tissues from a wide range of plant species to assess WUE (Brüggemann et al 2011;Wingate et al 2010). Further, in a growing number of studies it has been used successfully to investigate the role of WUE in drought adaptation (Ahmed et al 2013;Chen et al 2012). That is, as the ratio of internal to external CO 2 decreases, both WUE and carbon isotopic composition increase.…”
Section: Introductionmentioning
confidence: 99%
“…; Chen et al . ) values. Because the expression of quantitative characters underlies strong genotype by environment (G × E) interaction, QTL accounting for minor effects may remain undetected.…”
Section: Discussionmentioning
confidence: 95%
“…High genetic variation for grain Δ 13 C has been reported in C 3 species (Turner, 1997; Chen et al, 2012), with high heritability (e.g., from 0.76 to 0.85 in durum wheat; Merah et al, 2001) and a low GEI (Richards, 1996; Rebetzke et al, 2008a). For these characteristics, Δ 13 C is an attractive breeding target for improving WUE and yield, while the high cost required to measure each sample makes it an interesting candidate for MAS.…”
Section: Which Traits Should Be Targeted?mentioning
confidence: 99%